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    <meta charset="UTF-8">
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    <title>div和span</title>
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    <div>11111</div>
    <div>22222</div>
    <div>33333</div>

    <div>44444</div> 
    <div>55555</div>
    <div>55555</div>
    <strong>div区域划块了</strong>
    直接打&lt;div&gt;花括号55555*2
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    <h3><span>体育</span><span style="color: gray;">sports</span></h3>
    <strong>span不会破坏结构，主要用于修饰</strong>
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